8/25*516*2/7=8*516*2/(25*7)=8256/175=47.177141/7+5/14*2/13=(4*1)/(4*7)+(5*13)/(2*14)=(4+65)/28约=2.463/4*14/15-3/4÷15/2此题是否(3/4)*(14/15)-(3/4)/(15/2)=3和15约去余5,4和14约去2=(1*7)/(2*5)-(3*2)...